CatFlag interesting
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A misc in CatCTF

https://en.wikipedia.org/wiki/ANSI_escape_code?spm=wolai.workspace.0.0.1a8f6d3abrlcab

FILE = open("flag", 'wb')


def writeThings(b):
    FILE.write(b)


def MoveLeft(n=1):
    writeThings(b'\x1b[C' * n)


def MoveRight(n=1):
    writeThings(b'\x1b[D' * n)


FLAG = b' CatCTF{!2023_Will_Be_Special,2022_Was_Not!} '
# flag彩蛋:https://thwiki.cc/%E6%98%8E%E6%97%A5%E4%B9%8B%E7%9B%9B%EF%BC%8C%E6%98%A8%E6%97%A5%E4%B9%8B%E4%BF%97
import random

COUNT = 2022234
randpos = [random.randint(0, len(FLAG) - 1) for _ in range(COUNT)]
randchar = [random.randint(0x20, 0x7e) for _ in range(COUNT)]
# adjust char

for i in range(len(FLAG)):
    pos = COUNT
    for j in range(COUNT - 1, 0, -1):
        if (randpos[j] == i):
            pos = j
            break
    randchar[pos] = FLAG[i]

writeThings(b'\n')
POS = 0
for i in range(COUNT):
    if (randpos[i] > POS):
        MoveLeft(randpos[i] - POS)
    elif (randpos[i] < POS):
        MoveRight(POS - randpos[i])
    writeThings(bytearray([randchar[i]]))
    POS = randpos[i] + 1

writeThings(b'\n')
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Source: github.com/k4yt3x/flowerhd
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